CN112828257A - Pouring method utilizing end face profiling of centrifugal composite roll collar - Google Patents
Pouring method utilizing end face profiling of centrifugal composite roll collar Download PDFInfo
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- CN112828257A CN112828257A CN202011597662.3A CN202011597662A CN112828257A CN 112828257 A CN112828257 A CN 112828257A CN 202011597662 A CN202011597662 A CN 202011597662A CN 112828257 A CN112828257 A CN 112828257A
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- 239000002131 composite material Substances 0.000 title claims abstract description 164
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000005266 casting Methods 0.000 claims abstract description 33
- 238000009750 centrifugal casting Methods 0.000 claims abstract description 18
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 106
- 229910052742 iron Inorganic materials 0.000 claims description 46
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 238000007711 solidification Methods 0.000 abstract description 5
- 230000008023 solidification Effects 0.000 abstract description 5
- 238000001816 cooling Methods 0.000 abstract description 3
- 241000446313 Lamella Species 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 229910001562 pearlite Inorganic materials 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/04—Centrifugal casting; Casting by using centrifugal force of shallow solid or hollow bodies, e.g. wheels or rings, in moulds rotating around their axis of symmetry
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
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Abstract
The invention relates to a pouring method by utilizing end face profiling of a centrifugal composite roll collar, which belongs to the technical field of casting tools and comprises the following two steps: 1) manufacturing an end face profiling and a die of the centrifugal composite roll collar with the boss; 2) and combining the profiling of the upper end face and the lower end face with the die, and pouring in a centrifugal casting mode to obtain a composite roll collar blank. According to the invention, the model end cover with the boss on the end surface of the roller is manufactured by profiling, so that the requirement of the modeling is met, the whole weight of the end cover is not increased, the boss and the non-boss are both in a reasonable sand-eating amount range, the solidification cooling speed of the end surface of the product is ensured, the carbide content of the product is increased from 4.25% to 6.63%, the end surface structure of the outer layer is more compact, and the pearlite structure lamella is thinner after heat treatment; by adopting a reasonable pouring method, the high hardness and high wear resistance of the used part of the outer layer and the high toughness of the inner layer of the product are ensured, and the stability of the product quality is also ensured.
Description
Technical Field
The invention relates to a pouring method utilizing end face profiling of a centrifugal composite roll collar, and belongs to the technical field of casting tools.
Background
The conventional end cover is a flat cover during the production of the centrifugal roll collar, the sand eating amount with certain thickness is needed, potential safety hazards are generated when the sand eating amount is too small, the solidification cooling speed of the roll collar is reduced when the sand eating amount is too large, the structure of the roll collar is thick, and the product quality is influenced. When the end face of the production roller is a flat roller, the flat end cover can ensure the normal sand-eating amount. However, when the end face of the roller has a boss, the flat end cover is continuously used for producing a composite roller ring blank without the boss, and then the blank is processed into the roller with the boss, so that the solidification speed of the non-boss part of the roller ring is low, the product quality is influenced, and the gross-to-net ratio of the roller ring is large.
The invention adopts the profiling to manufacture the lug boss, improves the design of the end cover, designs the cast tooth fall on the end cover, meets the molding requirement, ensures that the whole weight of the end cover is not increased, ensures that the lug boss and the non-lug boss are both in a reasonable sand-eating amount range, and improves the product quality; and a reasonable pouring method is adopted, so that the stability of the quality of the workpiece is ensured.
Disclosure of Invention
The invention aims to provide a casting method for profiling an end face of a centrifugal composite roll collar, which reduces the production cost and improves the quality of a workpiece.
In order to achieve the purpose, the invention adopts the technical scheme that:
a casting method utilizing end surface profiling of a centrifugal composite roll collar comprises the following steps:
1) manufacturing an end face profiling and a die of the centrifugal composite roll collar with the boss;
2) and combining the profiling and the die on the upper end face and the lower end face, and pouring in a centrifugal casting mode to obtain the composite roll collar blank with the outer layer of the composite roll collar blank and the inner layer of the composite roll collar blank.
The technical scheme of the invention is further improved as follows: the end face profiling of the centrifugal composite roll collar with the boss in the step 1) is of an integrally arranged annular structure, an end cover plane area, an end cover reducing area and an end cover boss area are sequentially arranged on the annular structure from the outer side to the center, the upper surface and the lower surface of each part of the annular structure are parallel, and a molten iron pouring hole is formed in the center of the end cover boss area.
The technical scheme of the invention is further improved as follows: casting teeth convenient for hanging materials are uniformly arranged in the end face profiling of the centrifugal composite roll collar in the step 1) along the radial direction and the circumferential direction.
The technical scheme of the invention is further improved as follows: the profiling structures of the upper end face and the lower end face of the step 2) are the same, but the profiling of the lower end face does not have a molten iron pouring hole, and the mold is of a peripheral cold type.
The technical scheme of the invention is further improved as follows: and 2) adopting a layered casting method, wherein an axial reducing boundary I or a reducing boundary II corresponding to boss reducing positions at two ends of the composite roll collar blank is used as a boundary in the casting process.
The technical scheme of the invention is further improved as follows: the centrifugal casting process of the step 2) comprises the following steps:
A. pouring the outer layer molten iron of the composite roll collar blank: pouring the outer layer of the composite roll collar blank at the speed of 3-5mm/s until the diameter-variable boundary II is formed;
B. spacing: idling for a certain time at intervals after the outer layer of the composite roll collar blank is cast;
C. pouring molten iron on the inner layer of the composite roll collar blank: firstly, pouring the area at the position of the reducing boundary line II of 50-80mm at the speed of 5-8mm/s, and then pouring the inner layer part of the other composite roll collar blanks at the speed of 3-5mm/s to obtain the composite roll collar blanks.
The technical scheme of the invention is further improved as follows: the centrifugal casting process of the step 2) comprises the following steps:
A. pouring the outer layer molten iron of the composite roll collar blank: pouring the outer layer of the composite roll collar blank at the speed of 3-5mm/s to a reducing boundary I;
B. spacing: idling for a certain time at intervals after the outer layer of the composite roll collar blank is cast;
C. pouring molten iron on the inner layer of the composite roll collar blank: and firstly, pouring the area between the diameter-changing boundary I and the diameter-changing boundary II at the speed of 5-8mm/s, and then pouring the inner layer part of the other composite roll collar blanks at the speed of 3-5mm/s to obtain the composite roll collar blanks.
The technical scheme of the invention is further improved as follows: the main component content of the outer layer molten iron of the composite roll collar blank is C: 1.5-2.5%, Si: 0.2-1.0%, Cr: 1.0-4.0%, Mo: 1.0-2.0%, the balance of Fe, and the molten iron C of the inner layer of the composite roll collar blank: 1.0-2.0%, Si: 1.0-2.0%, Cr is less than or equal to 0.5%, Mo is less than or equal to 0.5%, and the balance is Fe.
The technical scheme of the invention is further improved as follows: the interval idle time is 10-20 min.
Due to the adoption of the technical scheme, the invention has the following technical effects:
according to the invention, the model end cover with the boss on the end surface of the roller is manufactured by profiling, so that the requirement of the modeling is met, the whole weight of the end cover is not increased, the boss and the non-boss are both in a reasonable sand-eating amount range, the solidification cooling speed of the end surface of the product is ensured, the carbide content of the product is increased from 4.25% to 6.63%, the end surface structure of the outer layer is more compact, and the pearlite structure lamella is thinner after heat treatment; by adopting a reasonable pouring method, the high hardness and high wear resistance of the used part of the outer layer and the high toughness of the inner layer of the product are ensured, and the stability of the product quality is also ensured.
The end cover modeling of the invention uses the profiling design, and reduces the gross-to-net ratio of the produced product, thereby reducing the production cost of the product.
The invention designs that the boundary line of the inner layer and the outer layer is in a plane position, which is beneficial to the stability of the interface.
The invention adopts a method of quickly pouring through the variable diameter position, which is beneficial to the consistency of the solidification sequence and improves the quality of the product.
Drawings
FIG. 1 is a schematic structural diagram of a composite roll collar blank after molten iron is poured by taking a reducing boundary II as a boundary according to the invention;
FIG. 2 is a schematic structural diagram of a composite roll collar blank after molten iron is poured by taking a reducing boundary I as a boundary according to the invention;
FIG. 3 is a schematic representation of an end face profiling configuration of the present invention;
FIG. 4 is a schematic view of a prior art flat end cap construction;
FIG. 5 is a schematic view of a prior art composite roll collar blank after casting molten iron;
the roll collar forming process comprises the following steps of 1, upper end face profiling, 1-1, end cover plane area, 1-2, end cover reducing area, 1-3, end cover boss area, 1-4, casting teeth, 2, lower end face profiling, 3, die, 4, composite roll collar blank outer layer, 5, composite roll collar blank inner layer, 6, reducing boundary lines I and 7, reducing boundary lines II and 8 and boundary lines.
Detailed Description
The technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings and the detailed description. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A casting method utilizing end surface profiling of a centrifugal composite roll collar comprises the following steps:
1) and manufacturing an end face profiling and a die of the centrifugal composite roll collar with the boss. As shown in fig. 3: the end surface profiling is an integrally arranged annular structure, the annular structure is sequentially arranged into an end cover plane area 1-1, an end cover reducing area 1-2 and an end cover boss area 1-3 from outside to inside, the upper surface and the lower surface of each part of the annular structure are parallel, and a molten iron pouring hole is formed in the center of the end cover boss area 1-3. Cast teeth 1-4 convenient for hanging materials are uniformly arranged in the end face profiling of the centrifugal composite roll collar along the radial direction and the circumferential direction.
2) And combining the profiling of the upper end face and the lower end face with the die, and pouring in a centrifugal casting mode to obtain the composite roll collar blank with the boss. As shown in fig. 1 or fig. 2: the profiling structures of the upper end surface and the lower end surface are the same, but the lower end surface is profiled and is provided with a molten iron-free pouring hole, and the mold is in a peripheral cold shape; the obtained composite roll collar blank comprises a high-hardness and high-wear-resistance composite roll collar blank outer layer 4 and a high-toughness composite roll collar blank inner layer 5 which are integrally arranged from outside to inside, and the composite roll collar blank outer layer 4 and the composite roll collar blank inner layer 5 use an axial reducing boundary I6 or a reducing boundary II 7 corresponding to boss reducing positions at two ends of the composite roll collar blank as boundaries in the casting process. As shown in fig. 2, the reducing boundary I6 is specifically a line parallel to the axis corresponding to the reducing starting point from the outside to the inside of the bosses at the two ends of the composite roll collar blank; as shown in fig. 1, the reducing boundary ii 7 is specifically a line parallel to the axis corresponding to the reducing end points of the bosses at the two ends of the composite roll collar blank from outside to inside.
The centrifugal casting process takes a reducing boundary II 7 as a boundary of the outer layer 4 of the composite roll collar blank and the inner layer 5 of the composite roll collar blank:
A. pouring the outer layer molten iron of the composite roll collar blank: pouring the outer layer 4 of the composite roll collar blank at a speed of 3-5mm/s until a reducing boundary II 7 is formed, and ensuring the use thickness of the outer layer of the product by taking the reducing boundary II 7 as the boundary between the outer layer 4 of the composite roll collar blank and the inner layer 5 of the composite roll collar blank;
B. spacing: idling for 10-20min at intervals after the outer layer 4 of the composite roll collar blank is poured;
C. pouring molten iron on the inner layer of the composite roll collar blank: firstly, pouring the area at 750-80 mm of the reducing boundary line II at the speed of 5-8mm/s, and then pouring the inner layer 5 part of the blank of the rest composite roll ring at the speed of 3-5 mm/s.
And secondly, taking a reducing boundary I6 as a boundary of the outer layer 4 of the composite roll collar blank and the inner layer 5 of the composite roll collar blank in a centrifugal casting process:
A. pouring the outer layer molten iron of the composite roll collar blank: pouring the outer layer 4 of the composite roll collar blank at a speed of 3-5mm/s until a reducing boundary I6, and taking the reducing boundary I6 as a boundary between the outer layer 4 of the composite roll collar blank and the inner layer 5 of the composite roll collar blank to ensure the use thickness of the outer layer of a product;
B. spacing: idling for 10-20min at intervals after the outer layer 4 of the composite roll collar blank is poured;
C. pouring molten iron on the inner layer of the composite roll collar blank: firstly, pouring the area between the reducing boundary I6 and the reducing boundary II 7 at the speed of 5-8mm/s, and then pouring the inner layer 5 part of the blank of the other composite roll collar at the speed of 3-5 mm/s.
The molten iron on the outer layer of the composite roll collar blank under the two conditions has the main component content of C: 1.5-2.5%, Si: 0.2-1.0%, Cr: 1.0-4.0%, Mo: 1.0-2.0%, the balance of Fe, and the molten iron C of the inner layer of the composite roll collar blank: 1.0-2.0%, Si: 1.0-2.0%, Cr is less than or equal to 0.5%, Mo is less than or equal to 0.5%, and the balance is Fe.
Example 1
1) And manufacturing an end face profiling and a die of the centrifugal composite roll collar with the boss. As shown in fig. 3: the end surface profiling is an integrally arranged annular structure, the annular structure is sequentially arranged into an end cover plane area 1-1, an end cover reducing area 1-2 and an end cover boss area 1-3 from outside to inside, the upper surface and the lower surface of each part of the annular structure are parallel, and a molten iron pouring hole is formed in the center of the end cover boss area 1-3. Cast teeth 1-4 convenient for hanging materials are uniformly arranged in the end face profiling of the centrifugal composite roll collar along the radial direction and the circumferential direction.
2) And combining the profiling of the upper end face and the lower end face with the die, and pouring in a centrifugal casting mode to obtain the composite roll collar blank with the boss. As shown in fig. 1: the profiling structures of the upper end surface and the lower end surface are the same, but the lower end surface is profiled and is provided with a molten iron-free pouring hole, and the mold is in a peripheral cold shape; the obtained composite roll collar blank comprises a high-hardness and high-wear-resistance composite roll collar blank outer layer 4 and a high-toughness composite roll collar blank inner layer 5 which are integrally arranged from outside to inside, and the composite roll collar blank outer layer 4 and the composite roll collar blank inner layer 5 use axial reducing boundary lines II 7 corresponding to boss reducing positions at two ends of the composite roll collar blank as boundary lines in the casting process.
And (3) centrifugal casting:
A. pouring the outer layer molten iron of the composite roll collar blank: the outer layer molten iron comprises the following main components: 1.5-2.5%, Si: 0.2-1.0%, Cr: 1.0-4.0%, Mo: 1.0-2.0% and the balance Fe. Pouring the outer layer 4 of the composite roll collar blank at a speed of 3-5mm/s until a reducing boundary II 7 is formed, and ensuring the use thickness of the outer layer of the product by taking the reducing boundary II 7 as the boundary between the outer layer 4 of the composite roll collar blank and the inner layer 5 of the composite roll collar blank;
B. spacing: idling for 10-20min at intervals after the outer layer 4 of the composite roll collar blank is poured;
C. pouring molten iron on the inner layer of the composite roll collar blank: the main component C of the inner layer molten iron is as follows: 1.0-2.0%, Si: 1.0-2.0%, Cr is less than or equal to 0.5%, Mo is less than or equal to 0.5%, and the balance is Fe. Firstly, pouring the area at 750-80 mm of the reducing boundary II at the speed of 5-8mm/s, and then pouring the inner 5 parts of the rest of the composite roll collar blank at the speed of 3-5mm/s to obtain the composite roll collar blank.
Example 2
1) And (4) manufacturing an end face profile of the centrifugal composite roll collar with the boss. As shown in fig. 3: the end surface profiling is an integrally arranged annular structure, the annular structure is sequentially arranged into an end cover plane area 1-1, an end cover reducing area 1-2 and an end cover boss area 1-3 from outside to inside, the upper surface and the lower surface of each part of the annular structure are parallel, and a molten iron pouring hole is formed in the center of the end cover boss area 1-3. Cast teeth 1-4 convenient for hanging materials are uniformly arranged in the end face profiling of the centrifugal composite roll collar along the radial direction and the circumferential direction.
2) And combining the profiling of the upper end face and the lower end face with the die, and pouring in a centrifugal casting mode to obtain a composite roll collar blank. As shown in fig. 2: the profiling structures of the upper end surface and the lower end surface are the same, but the lower end surface is profiled and is provided with a molten iron-free pouring hole, and the mold is in a peripheral cold shape; the obtained composite roll collar blank comprises a high-hardness and high-wear-resistance composite roll collar blank outer layer 4 and a high-toughness composite roll collar blank inner layer 5 which are integrally arranged from outside to inside, and the composite roll collar blank outer layer 4 and the composite roll collar blank inner layer 5 use axial reducing boundary I6 corresponding to boss reducing positions at two ends of the composite roll collar blank as boundaries in the casting process.
And (3) centrifugal casting:
A. pouring the outer layer molten iron of the composite roll collar blank: the outer layer molten iron comprises the following main components: 1.5-2.5%, Si: 0.2-1.0%, Cr: 1.0-4.0%, Mo: 1.0-2.0% and the balance Fe. Pouring the outer layer 4 of the composite roll collar blank at a speed of 3-5mm/s until a reducing boundary I6, and taking the reducing boundary I6 as a boundary between the outer layer 4 of the composite roll collar blank and the inner layer 5 of the composite roll collar blank to ensure the use thickness of the outer layer of a product;
B. spacing: idling for 10-20min at intervals after the outer layer 4 of the composite roll collar blank is poured;
C. pouring molten iron on the inner layer of the composite roll collar blank: the main component C of the inner layer molten iron is as follows: 1.0-2.0%, Si: 1.0-2.0%, Cr is less than or equal to 0.5%, Mo is less than or equal to 0.5%, and the balance is Fe. Firstly, pouring the area between the reducing boundary I6 and the reducing boundary II 7 at the speed of 5-8mm/s, and then pouring the inner layer 5 part of the other composite roll collar blanks at the speed of 3-5mm/s to obtain the composite roll collar blanks.
Comparative example 1
1) The flat end caps of the centrifugal composite roll collar shown in fig. 4 were made.
2) And combining the upper end cover, the lower end cover and the die, and pouring in a centrifugal casting mode to obtain the boss-free composite roll collar blank. As shown in fig. 5, the upper end cover and the lower end cover have the same structure, but the lower end cover does not have a molten iron pouring hole, and the mold is of a peripheral cold type; the obtained composite roll collar blank comprises a high-hardness high-wear-resistance composite roll collar blank outer layer 4 and a high-toughness composite roll collar blank inner layer 5 which are integrally arranged from outside to inside, and the position of a boundary 8 is determined by the composite roll collar blank outer layer 4 and the composite roll collar blank inner layer 5 according to the application requirements of the composite roll collar blank outer layer 4 in the casting process.
And (3) centrifugal casting:
A. pouring the outer layer molten iron of the composite roll collar blank: the outer layer molten iron comprises the following main components: 1.5-2.5%, Si: 0.2-1.0%, Cr: 1.0-4.0%, Mo: 1.0-2.0% and the balance Fe. Pouring the outer layer 4 of the composite roll collar blank at a speed of 3-5mm/s until the boundary 8 is formed, and ensuring the use thickness of the outer layer of the product by taking the boundary 8 as the boundary between the outer layer 4 of the composite roll collar blank and the inner layer 5 of the composite roll collar blank;
B. spacing: idling for 10-20min at intervals after the outer layer 4 of the composite roll collar blank is poured;
C. pouring molten iron on the inner layer of the composite roll collar blank: the main component C of the inner layer molten iron is as follows: 1.0-2.0%, Si: 1.0-2.0%, Cr is less than or equal to 0.5%, Mo is less than or equal to 0.5%, and the balance is Fe. And (3) pouring the inner layer 5 part of the composite roll collar blank at the speed of 3-5mm/s to obtain the composite roll collar blank without the boss.
Comparative example 2
1) The flat end caps of the centrifugal composite roll collar shown in fig. 4 were made.
2) And combining the upper end cover, the lower end cover and the die, and pouring in a centrifugal casting mode to obtain the boss-free composite roll collar blank. As shown in fig. 5: the upper end cover and the lower end cover have the same structure, but the lower end cover does not have a molten iron pouring hole, and the mold is of a peripheral cold type; the obtained composite roll collar blank comprises a high-hardness high-wear-resistance composite roll collar blank outer layer 4 and a high-toughness composite roll collar blank inner layer 5 which are integrally arranged from outside to inside, and the position of a boundary 8 is determined by the composite roll collar blank outer layer 4 and the composite roll collar blank inner layer 5 according to the application requirements of the composite roll collar blank outer layer 4 in the casting process.
And (3) centrifugal casting:
A. pouring the outer layer molten iron of the composite roll collar blank: the outer layer molten iron comprises the following main components: 1.0-2.0%, Si: 1.0-2.0%, Cr is less than or equal to 0.5%, Mo is less than or equal to 0.5%, and the balance is Fe. Pouring the outer layer 4 of the composite roll collar blank at a speed of 3-5mm/s until the boundary 8 is formed, and ensuring the use thickness of the outer layer of the product by taking the boundary 8 as the boundary between the outer layer 4 of the composite roll collar blank and the inner layer 5 of the composite roll collar blank;
B. spacing: idling for 10-20min at intervals after the outer layer 4 of the composite roll collar blank is poured;
C. pouring molten iron on the inner layer of the composite roll collar blank: the main component C of the inner layer molten iron is as follows: 1.0-2.0%, Si: 1.0-2.0%, Cr is less than or equal to 0.5%, Mo is less than or equal to 0.5%, and the balance is Fe. And (3) casting the inner layer 5 part of the composite roll collar blank at the speed of 3-5mm/s to obtain the composite roll collar blank.
When the products with the specification of 1200mm to 228mm are manufactured by adopting the methods of the embodiment 1, the embodiment 2, the comparison example 1 and the comparison example 2, the embodiment 1-2 has small workload and high working efficiency in further processing; the composite roll collar blanks obtained in the comparative examples 1-2 have no boss structure, and further have large workload.
The production cost and quality data of each product are compared as follows:
as shown in the above table: (1) the total water requirement of the product prepared by the method is reduced by 270Kg, and the production cost is reduced by 10.5%; (2) the carbide content of the product prepared by the method is obviously increased, and the end face structure of the outer layer is more compact; (3) the product prepared by the method has high outer layer hardness, high hardness and good wear resistance.
Claims (9)
1. A casting method by utilizing end surface profiling of a centrifugal composite roll collar is characterized by comprising the following steps: the method comprises the following steps:
1) manufacturing an end face profiling and a die of the centrifugal composite roll collar with the boss;
2) and combining the profiling and the die on the upper end face and the lower end face, and pouring in a centrifugal casting mode to obtain the composite roll collar blank with the composite roll collar blank outer layer (4) and the composite roll collar blank inner layer (5).
2. The casting method by using the end surface profiling of the centrifugal composite roll collar as claimed in claim 1, wherein the casting method comprises the following steps: the end face profiling of the centrifugal composite roll collar with the boss in the step 1) is of an integrally arranged annular structure, an end cover plane area (1-1), an end cover reducing area (1-2) and an end cover boss area (1-3) are sequentially arranged from the outer side to the center of the annular structure, the upper surface and the lower surface of each part of the annular structure are parallel, and a molten iron pouring hole is formed in the center of the end cover boss area (1-3).
3. A casting method using centrifugal composite roll collar end face profiling according to claim 1 or 2, characterized in that: casting teeth (1-4) convenient for hanging materials are uniformly arranged in the end face profiling of the centrifugal composite roll collar in the step 1) along the radial direction and the circumferential direction.
4. The casting method by using the end surface profiling of the centrifugal composite roll collar as claimed in claim 3, wherein the casting method comprises the following steps: the profiling structures of the upper end face and the lower end face of the step 2) are the same, but the profiling of the lower end face does not have a molten iron pouring hole, and the mold is of a peripheral cold type.
5. The casting method by using the end surface profiling of the centrifugal composite roll collar as claimed in claim 1, wherein the casting method comprises the following steps: and 2) adopting a layered casting method, and taking an axial reducing boundary I (6) or a reducing boundary II (7) corresponding to the boss reducing positions at the two ends of the composite roll collar blank as a boundary in the casting process.
6. The casting method by using the end surface profiling of the centrifugal composite roll collar as claimed in claim 5, wherein the casting method comprises the following steps: the centrifugal casting process of the step 2) comprises the following steps:
A. pouring the outer layer molten iron of the composite roll collar blank: pouring the outer layer (4) of the composite roll collar blank at the speed of 3-5mm/s until the diameter-variable boundary line II (7);
B. spacing: idling for a certain time at intervals after the outer layer (4) of the composite roll collar blank is poured;
C. pouring molten iron on the inner layer of the composite roll collar blank: firstly, pouring the area at the 50-80mm position of the reducing boundary II (7) at the speed of 5-8mm/s, and then pouring the inner layer (5) part of the rest of the composite roll collar blank at the speed of 3-5mm/s to obtain the composite roll collar blank.
7. The casting method by using the end surface profiling of the centrifugal composite roll collar as claimed in claim 5, wherein the casting method comprises the following steps: the centrifugal casting process of the step 2) comprises the following steps:
A. pouring the outer layer molten iron of the composite roll collar blank: pouring the outer layer (4) of the composite roll collar blank at the speed of 3-5mm/s until the diameter-variable boundary I (6);
B. spacing: idling for a certain time at intervals after the outer layer (4) of the composite roll collar blank is poured;
C. pouring molten iron on the inner layer of the composite roll collar blank: firstly, pouring the area between the diameter-variable boundary I (6) and the diameter-variable boundary II (7) at the speed of 5-8mm/s, and then pouring the inner layer (5) of the rest of the composite roll collar blank at the speed of 3-5mm/s to obtain the composite roll collar blank.
8. A casting method using centrifugal composite roll collar end face profiling according to claim 6 or 7, characterized in that: the main component content of the outer layer molten iron of the composite roll collar blank is C: 1.5-2.5%, Si: 0.2-1.0%, Cr: 1.0-4.0%, Mo: 1.0-2.0%, the balance of Fe, and the molten iron C of the inner layer of the composite roll collar blank: 1.0-2.0%, Si: 1.0-2.0%, Cr is less than or equal to 0.5%, Mo is less than or equal to 0.5%, and the balance is Fe.
9. A casting method using centrifugal composite roll collar end face profiling according to claim 6 or 7, characterized in that: the interval idle time is 10-20 min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011597662.3A CN112828257A (en) | 2020-12-29 | 2020-12-29 | Pouring method utilizing end face profiling of centrifugal composite roll collar |
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| CN204953846U (en) * | 2015-08-19 | 2016-01-13 | 邢台正锟机械轧辊有限公司 | Centrifugation composite roll casting cold mould end cover |
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| CN105195704A (en) * | 2015-02-04 | 2015-12-30 | 镇江市丹徒区环宇轧辊厂 | Centrifugal casting mold composite end cover and method for carrying out composite roll centrifugal casting through same |
| CN204953846U (en) * | 2015-08-19 | 2016-01-13 | 邢台正锟机械轧辊有限公司 | Centrifugation composite roll casting cold mould end cover |
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